In the winter in the south of Japan, the meaning of eating glutinous rice balls is to celebrate reunion and sweetness. The shape of glutinous rice balls is round, and a family sitting together means round and lively. The stuffing of glutinous rice balls is sweet black sesame and white sugar, which means sweetness.

The winter solstice is at the end of the year. After wrapping jiaozi on the solstice in winter, the family ate jiaozi together, which means they grew up by another year.

Characteristics of solar terms from winter solstice: the sunshine time is short, and around the winter solstice, although the northern hemisphere has the shortest sunshine time and receives the least amount of solar radiation, the accumulated heat on the ground in summer half year can also provide some supplements, so the temperature is not the lowest at this time. "After eating the winter solstice dinner, the days get longer." After the winter solstice, the days get longer and longer.

The solar radiation obtained on the ground is still less than the heat lost by the ground radiation, so the temperature will continue to drop in the short term. In China, except for a few islands and coastal areas, 1 is the coldest month, so there is a folk saying that winter solstice is not too cold, and astronomy also stipulates that winter solstice is the beginning of winter in the northern hemisphere.

The temperature is low and the climate is cold. From the climate point of view, during the winter solstice, the average temperature in the northwest plateau is generally below 0℃, and the southern region is only about 6℃ to 8℃. In addition, the winter solstice begins to count to nine, and the winter solstice becomes the first day to count to nine.